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  Subjects -> CHEMISTRY (Total: 848 journals)
    - ANALYTICAL CHEMISTRY (50 journals)
    - CHEMISTRY (598 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (25 journals)
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ANALYTICAL CHEMISTRY (50 journals)

Showing 1 - 50 of 50 Journals sorted alphabetically
Accounts of Chemical Research     Full-text available via subscription   (Followers: 108)
Acta Analytica     Hybrid Journal   (Followers: 7)
Advances in Analytical Chemistry     Open Access   (Followers: 29)
American Journal of Analytical Chemistry     Open Access   (Followers: 32)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 28)
Analytical Chemistry     Full-text available via subscription   (Followers: 254)
Analytical Chemistry Insights     Open Access   (Followers: 22)
Analytical Chemistry Research     Open Access   (Followers: 8)
Analytical Letters     Hybrid Journal   (Followers: 11)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 10)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 10)
Biomonitoring     Open Access   (Followers: 2)
Chemical Data Collections     Hybrid Journal  
Chinese Journal of Analytical Chemistry     Full-text available via subscription   (Followers: 3)
Combinatorial Chemistry - an Online Journal     Open Access   (Followers: 2)
Composites Communications     Full-text available via subscription  
Comprehensive Analytical Chemistry     Full-text available via subscription   (Followers: 5)
Critical Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 26)
Current Analytical Chemistry     Hybrid Journal   (Followers: 7)
Drug Testing and Analysis     Hybrid Journal   (Followers: 6)
Electroanalysis     Hybrid Journal   (Followers: 6)
Field Analytical Chemistry and Technology     Hybrid Journal   (Followers: 4)
Handbook of Analytical Separations     Full-text available via subscription   (Followers: 1)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription   (Followers: 1)
International Journal of Analytical Chemistry     Open Access   (Followers: 21)
International Journal of Chemical and Analytical Science     Full-text available via subscription   (Followers: 3)
International Journal of Environmental Analytical Chemistry     Hybrid Journal   (Followers: 7)
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (Followers: 7)
Journal of Analytical & Bioanalytical Techniques     Open Access   (Followers: 6)
Journal of Analytical Atomic Spectrometry     Full-text available via subscription   (Followers: 10)
Journal of Analytical Chemistry     Hybrid Journal   (Followers: 21)
Journal of Combinatorial Chemistry     Full-text available via subscription  
Journal of Electroanalytical Chemistry     Hybrid Journal   (Followers: 5)
Journal of Essential Oil Research     Hybrid Journal   (Followers: 2)
Journal of Radioanalytical and Nuclear Chemistry     Hybrid Journal   (Followers: 5)
Journal of Thermal Analysis and Calorimetry     Hybrid Journal   (Followers: 23)
Main Group Metal Chemistry     Hybrid Journal   (Followers: 1)
Microchemical Journal     Hybrid Journal   (Followers: 3)
Nigerian Journal of Chemical Research     Full-text available via subscription  
Phytochemical Analysis     Hybrid Journal   (Followers: 2)
Polish Journal of Chemical Technology     Open Access   (Followers: 1)
Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 10)
Sample Preparation     Open Access  
Surface and Interface Analysis     Hybrid Journal   (Followers: 14)
Techniques and Instrumentation in Analytical Chemistry     Full-text available via subscription   (Followers: 5)
TrAC Trends in Analytical Chemistry     Full-text available via subscription   (Followers: 51)
Trends in Environmental Analytical Chemistry     Hybrid Journal   (Followers: 2)
Vibrational Spectroscopy     Hybrid Journal   (Followers: 13)
World Journal of Analytical Chemistry     Open Access   (Followers: 1)
Journal Cover Journal of Analytical Chemistry
  [SJR: 0.268]   [H-I: 23]   [21 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1608-3199 - ISSN (Online) 1061-9348
   Published by Springer-Verlag Homepage  [2345 journals]
  • Stoichiography and present-day analytical chemistry of solid inorganic
           substances and materials
    • Authors: V. V. Malakhov
      Pages: 583 - 596
      Abstract: The article covers factors that determine fundamental difficulties of chemical phase analysis of a mixture of solid phases of inorganic compounds. Stoichiographic principles and methods, novel for analytical chemistry and leading to the efficient solution of the problems of phase analysis, are discussed. Conditions of the selective separation of mixtures of multiphase multielement solid compounds and principles of the new method, fan-like separation, ensuring the extraction of individual phases from unseparated mixtures, are considered. An idea of a complex method of solving analytical problems by stoichiography methods in proposed. The problem of the multiplicity of objects of analysis is discussed and general principles of the efficient solution of problems of the detection and identification of components of complex mixtures of unknown chemical composition are considered.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060090
      Issue No: Vol. 72, No. 6 (2017)
       
  • A luminescence immunoassay test method for determining benzo[a]pyrene in
           natural water
    • Authors: N. V. Beloglazova; P. S. Shmelin; A. S. Novikova; I. Yu. Goryacheva
      Pages: 597 - 601
      Abstract: A test method is developed for determining benzo[a]pyrene in natural water, based on the use of a polyethylene filter (frit) with adsorbed specific antibodies, placed within a transparent column. In passing a test solution, the analyte is adsorbed on the frit similarly to the process implemented in immunoaffinity preconcentration. The added conjugate of a labeled analyte takes the remained vacant binding sites of antibodies. Luminescent semiconductor nanoparticles (quantum dots) CdSe/ZnS, used as labels, enable visual determination under irradiation with UV light. The limit of detection for benzo[a]pyrene in water is ~0.5 ng/mL.
      PubDate: 2017-06-01
      DOI: 10.1134/s106193481706003x
      Issue No: Vol. 72, No. 6 (2017)
       
  • Application of microemulsions to the recovery, preconcentration, and
           determination of ten surfactants from various soils
    • Authors: N. G. Tolmacheva; M. Zhang; A. V. Pirogov; M. V. Popik; O. A. Shpigun
      Pages: 602 - 607
      Abstract: The application of a microemulsion (ME), consisting of 3% of sodium dodecyl sulfate, 0.8% of benzene, 0.6% of n-butanol, and 90.2% of water, to the extraction of ten polycyclic aromatic hydrocarbons (PAHs) from soil and simultaneous preconcentration of the analytes in the organic phase after separation of the microemulsion is demonstrated. PAHs were determined by HPLC with fluorimetric detection. The recovery rates of PAHs from different types of soil (sand, peat, and clay) are 90–105%. The preconcentration ratios of PAHs in the organic phase formed after the separation of the microemulsion were 5–6.5; the limits of detection were 0.1–0.7 μg/kg. The duration of sample preparation was 20 min.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060156
      Issue No: Vol. 72, No. 6 (2017)
       
  • Determination of Ni, Co, and Cu in seawater by total external reflection
           X-ray fluorescence spectrometry
    • Authors: A. V. Malkov; A. Yu. Kozhevnikov; D. S. Kosyakov; A. E. Kosheleva
      Pages: 608 - 616
      Abstract: Total external reflection X-ray fluorescence spectrometry is a promising method for the highly sensitive determination of heavy metals in seawater, offering such advantages as the mobility of the used equipment and the low cost of analysis. Various methods of sample preparation to the analysis of seawater aimed at the elimination of interferences with the salt matrix were compared. It was shown that the method based on the preliminary extraction of metals as diehyldithiocarbamate complexes followed by back extraction is characterized by the highest efficiency. A procedure was developed for the determination of Ni, Cu, and Co in seawater with limits of detection at a level of 0.16–0.26 μg/L.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060107
      Issue No: Vol. 72, No. 6 (2017)
       
  • Microspectrophotometric determination of erythrosine in beverage and water
           samples after ultrasonic assisted supramolecular-based dispersion
           solidification liquid–liquid microextraction
    • Authors: Ardeshir Shokrollahi; Hadi Behrooj Pili; Karim Hemmati Doust
      Pages: 617 - 623
      Abstract: An ultrasonic assisted supramolecular solvent based dispersion solidification liquid–liquid microexraction method was used for the separation and preconcenteration of erythrosine prior to its determination by microspectrophotometry. Under the optimal conditions, the enrichment and preconcentration factors obtained 142 and 33.33 respectively. The calibration curve was linear in the range of 1.0–100 ng/mL of erythrosine with R 2 = 0.9949. Detection limit was 0.6 ng/mL and the RSD for 7 replicate determination of 40.0 ng/mL erythrosine was ±1.4%. The applicability of the methods was examined by determining erythrosine in water and beverage samples.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060028
      Issue No: Vol. 72, No. 6 (2017)
       
  • Chromatographic and mass-spectrometric study of the surfaces of
           construction materials after contact with 1,1-dimethylhydrazine
    • Authors: S. D. Iartsev; I. S. Pytskii; I. G. Zenkevich; A. K. Buryak
      Pages: 624 - 631
      Abstract: The products of conversion of 1,1-dimethylhydrazine after contact with the surface of AMg-6 alloy, which is a model of construction materials that contact with rocket fuel components, were characterized by use of chromatographic and mass-spectrometric methods. Alkyl phthalates, the homologues of triphenyl phosphate, and numerous polymer-homologues related to acetone condensation products were detected in acetone extracts taken from the test surfaces. The presence of such products makes it possible to identify fuel components that contacted with the construction materials; this is important for the utilization of the detachable parts of launch vehicles.
      PubDate: 2017-06-01
      DOI: 10.1134/s106193481706017x
      Issue No: Vol. 72, No. 6 (2017)
       
  • Use of high-performance liquid chromatography coupled with high-resolution
           mass spectrometry for the identification and quantitative determination of
           tetrodotoxin in pharmaceuticals
    • Authors: V. V. Shalabai; V. F. Taranchenko; I. V. Rybal’chenko; A. V. Aksenov; A. M. Antokhin; F. M. Semchenko; M. S. Krymchak
      Pages: 632 - 638
      Abstract: A procedure is developed for the identification and determination of tetrodotoxin in pharmaceuticals by liquid chromatography coupled with high resolution mass spectrometry (HPLC−HRMS). The components of a pharmaceutical sample were separated in the gradient elution mode on a HILIC hydrophilic sorbent and detected by HRMS with electrospray ionization in the mode of registration of selected ion transitions. The calibration curve is linear in the range 0.75−1.25 μg/mL with the correlation coefficient > 0.9995.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060144
      Issue No: Vol. 72, No. 6 (2017)
       
  • Gas chromatographic determination of benzothiophenes in high-purity sulfur
    • Authors: V. A. Krylov; M. F. Churbanov; O. Yu. Chernova; A. Yu. Sozin
      Pages: 639 - 643
      Abstract: A procedure is developed for the determination of benzothiophene, dibenzothiophene, and 4,6-dimethyldibenzothiophene in high-purity sulfur, including liquid-phase microextraction preconcentration, identification by gas chromatography−mass spectrometry, and gas chromatographic determination with flame photometric detection. The rate of microextraction recovery was from 16 to 78%. The limits of detection were 8 × 10–5 wt % for benzophiophene and 2 × 10–5 wt % for dibenzothiophene and 4,6-dimethyldibenzothiophene.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060089
      Issue No: Vol. 72, No. 6 (2017)
       
  • Determination of palladium in sulfide-bearing rocks by electrothermal
           atomization atomic absorption spectrometry with a continuous spectrum
           source
    • Authors: N. F. Pchelintseva; D. A. Bychkov
      Pages: 644 - 648
      Abstract: A possibility of the direct determination of palladium in dissolved samples of platinum sulfide ores by high-resolution electrothermal atomic absorption spectrometry with a continuous light source without preconcentration and separation from the matrix components is investigated. The conditions of analysis are selected and a procedure for the determination of palladium is developed. The results of determination well agree with the data obtained using extraction separation and traditional atomic absorption spectrometry with selective line spectrum sources. The accuracy of the results was estimated by the added–found method.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060120
      Issue No: Vol. 72, No. 6 (2017)
       
  • Determination of impurities in high-purity niobium(V) oxide by
           high-resolution continuum source graphite furnace atomic absorption
           spectrometry after sorption preconcentration
    • Authors: V. V. Eskina; O. A. Dalnova; E. N. Kareva; V. B. Baranovskaya; Yu. A. Karpov
      Pages: 649 - 655
      Abstract: Method of sorption–atomic-absorption determination of Co, Cr, Cu, Fe, Mn, and Ni in samples of high-purity Nb2O5 with heterochain S,N-containing sorbents was developed. The method is based on the sorption preconcentration of trace impurities followed by their determination by high-resolution continuum source graphite furnace atomic absorption spectrometry (HR CS GFAAS). Selectivity of three original inhouse synthesized S,N-containing heterochain sorbents was studied. The recoveries of Co, Cr, Cu, Fe, Mn, and Ni using heterochain sorbents OKS, MTH, and GLSH were 100, 80, and 76%, correspondingly. Sorbent “OKS”, which provided the quantitative recovery of trace impurities, was chosen for further research. The sorption conditions for chloride solutions of different acidities (0.1–3 M HCl) were studied and optimized. Using the conditions established for the sorption and HR CS GFAAS analysis, trace Co, Cr, Cu, Fe, Mn, and Ni were determined in high purity Nb2O5 with a relative error less than 5%. The trueness control of the obtained results is confirmed by the “added–found” method. The developed method allows us to determine concentrations of analytes: 0.02–0.20 ppm Co, 2.0–3.3 ppm Cr, 0.2–1.5 ppm Cu, 6.0–21.0 ppm Fe, 0.6–0.8 ppm Mn, and 2.8–3.5 ppm Ni. The proposed methodology can be successfully extended to the determination of various trace elements in other high-purity inorganic materials.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060053
      Issue No: Vol. 72, No. 6 (2017)
       
  • Study of conditions of the formation of multidimensional spectroscopic
           fluorescence images of motor fuels and liquid mineral technical oils
    • Authors: A. A. Ganeev; I. O. Konyushenko; V. M. Nemets
      Pages: 656 - 661
      Abstract: Conditions and specific features of the use of fluorescence spectra for the formation of multidimensional spectroscopic images of liquid mineral technical oils and petrols are studied. Possibilities of the identification of corresponding samples by the method of pattern recognition using multifactor statistical processing of multidimensional analytical signals on the basis of principal component analysis are considered. The optimum conditions of the formation of spectroscopic fluorescence images are found.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060077
      Issue No: Vol. 72, No. 6 (2017)
       
  • Determination of the oxidation state of iron by X-ray fluorescence
           spectroscopy using chemometric approaches
    • Authors: V. V. Panchuk; N. O. Rabdano; A. A. Goidenko; A. V. Grebenyuk; S. M. Irkaev; V. G. Semenov
      Pages: 662 - 670
      Abstract: A possibility of identification of the oxidation state of iron by wavelength dispersive X-ray fluorescence spectroscopy using both the position and intensity of L α and L β spectral lines of iron and by principal component analysis score data obtained by the decomposition of the spectral region corresponding to spectral L-series lines of iron is demonstrated. The application of scores ensures a more reliable identification in comparison with line parameters (position and intensity). Two approaches based on projection on latent structures (PLS) regression for the determination of the concentration of iron in different oxidation states are proposed. The first approach consists in using reference models with compositions similar to those of analyzed samples. In the second approach, PLS regression was build using model spectra obtained from spectra of readily available iron compounds.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817040128
      Issue No: Vol. 72, No. 6 (2017)
       
  • Central composite design optimization of dispersive liquid–liquid
           microextraction based on solidification of organic drop for the
           determination of 5-hydroxymethyl-2-furfural in orange juice using
           high-performance liquid chromatography
    • Authors: Fereshteh Shiri; Beshare Hashemi; Sajad Sobhani
      Pages: 671 - 677
      Abstract: A simple, rapid and inexpensive dispersive liquid–liquid microextraction based on solidification of organic drop combined with HPLC was developed for the extraction and determination of trace levels of 5-hydroxymethyl-2-furfural in fruit juice. Effect of variables such as extracting and dispersive solvent volume and pH were investigated simultaneously using experimental design. Under the optimum conditions, the calibration graph was linear in the range of 1−200 μg/L with the detection limit of 0.3 μg/L. The optimized method revealed a good precision with relative standard deviation of 2.2%.The performance of the method was evaluated for extraction and determination of 5-hydroxymethyl-2-furfural in orange juice sample.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060065
      Issue No: Vol. 72, No. 6 (2017)
       
  • Semiconductor gallium arsenide electrodes for the potentiometric titration
           of mercaptans in raw hydrocarbons
    • Authors: V. A. Burakhta; S. S. Sataeva
      Pages: 678 - 681
      Abstract: Electrochemically modified electrodes based on gallium arsenide (GaAs) were designed for the potentiometric determination of mercaptans in raw hydrocarbons. The main electrochemical characteristics (linearity range of the electrode function, limit of detection, and slope of electrode function) were studied. The argentometric titration of mercaptans in a gas condensate was performed using the GaAs electrodes prior to and after modification. The use of the electrochemically modified electrode ensures a more reliable determination of the titration end-point.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060041
      Issue No: Vol. 72, No. 6 (2017)
       
  • High-sensitivity determination of Pb(II) and Cd(II) on a glassy carbon
           electrode modified with polypyrrole/sepiolite nanofibers
    • Authors: Yan Pan; Yong-Ping Dong; Xiang-Feng Chu; Hou-Cheng Ding
      Pages: 682 - 688
      Abstract: Polypyrrole-sepiolite (PPy/SPL) nanofibers were prepared by in situ chemical oxidation polymerization in the presence of sepiolite. A PPy/SPL composite modified glassy carbon electrode (PPy/SPL/GCE) was prepared and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and electrochemical methods. Differential pulse anodic stripping voltammetry for the simultaneous determination of trace Pb(II) and Cd(II) was carried out at the PPy/SPL/GCE. Operational parameters such as the deposition potential and time, the amount of modified suspension, and the pH values were optimized for the purpose of determination of trace metal ions in 0.10 M acetate buffer solution. Under the optimal conditions, the stripping peak currents showed good linear relationships with Pb(II) and Cd(II) at concentration ranges of 5.0 × 10–9‒1.2 × 10–6 M and 5.0 × 10–9‒1.2 × 10–7 M, and the detection limits were 1.2 and 1.5 nM, respectively. The proposed method is applicable to the simultaneous determination of trace Pb(II) and Cd(II) in real water samples with the relative standard deviations of less than 4.4% and the recovery rates of 97.9‒102.2%.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060168
      Issue No: Vol. 72, No. 6 (2017)
       
  • Graphene sheet for improving the electrocatalytic activity of a benzofuran
           derivative modified electrode for determination of epinephrine in the
           presence of serotonin
    • Authors: Mohammad Mazloum-Ardakani; Behnaz Brazesh; Laleh Hosseinzadeh; Alireza Khoshroo
      Pages: 689 - 698
      Abstract: A nanocomposite system based on coumarin derivative and graphene sheet was used to prepare a new electrochemical sensor. The objective of the mentioned nanocomposite was to investigate novel electrochemical properties enabling the quantification of epinephrine (Ep). Cyclic voltammetry was used to study the redox properties of the mentioned modified electrode at different scan rates. Henceforward, the electrocatalytic oxidation of Ep at the surface of the modified electrode was considered. The data has shown excellent catalytic activity of the modified electrode for the electrooxidation of Ep, which leads to a reduction of overpotential for more than 238 mV. According to differential pulse voltammetry (DPV), the oxidation of Ep showed a dynamic range between 0.1 and 1000.0 μM and the detection limit (3s) of 0.011 μM. Besides, DPV was used for the determination of Ep at the mentioned modified electrode in the presence of serotonin.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060119
      Issue No: Vol. 72, No. 6 (2017)
       
  • Study of archaeological artifact by chromatography–mass spectrometry
    • Authors: V. M. Pozhidaev; Ya. E. Sergeeva; A. V. Kamayev
      Pages: 699 - 702
      Abstract: An archaeological artifact, representing a compound piece of the Bronze Age, the outer surface of which is encrusted with seeds, has been investigated. The chemical composition of the organic binder was determined by gas chromatography and mass spectrometry; X-ray fluorescence analysis was used to determine the nature of the inorganic base of the artifact.
      PubDate: 2017-06-01
      DOI: 10.1134/s1061934817060132
      Issue No: Vol. 72, No. 6 (2017)
       
  • Methodology for separation and elemental analysis of volcanic ash
           nanoparticles
    • Authors: M. S. Ermolin; P. S. Fedotov; V. K. Karandashev; V. M. Shkinev
      Pages: 533 - 541
      Abstract: A methodology for separation, characterization, and quantitative elemental analysis of volcanic ash nanoparticles is proposed. A combination of field-flow fractionation in a rotating coiled column and membrane filtration is used in the isolation and separation of nanoparticles. The size and morphology of nanoparticles were studied by static light scattering and scanning electron microscopy. The concentration of major- and trace elements in the bulk sample and the separated fractions was determined by inductively coupled plasma atomic emission spectrometry and mass spectrometry. It is shown that the total concentrations of most elements in the ash sample are comparable to their average concentrations in the Earth’s crust. On the other side, in the fraction 50–100 nm, the concentrations of Ni, Zn, Ag, Sn, Sb, Pt, Tl, Pb, and Bi are one or two orders of magnitude higher than their total concentrations, which probably indicates the preconcentration of corresponding elements from volcanic gases by nanoparticles. In the fraction represented by water-soluble forms of elements and nanoparticles smaller than 50 nm, Cu, Zn, Pb, and several other elements are found; the partition of elements between the solution and solid phase (nanoparticles) is assessed. The proposed methodology requires further development and application to the analysis of volcanic ash from various regions of the Globe.
      PubDate: 2017-05-01
      DOI: 10.1134/s1061934817050069
      Issue No: Vol. 72, No. 5 (2017)
       
  • Complex formation of thiocyanate ions with iron(III) on the solid phase of
           fibrous ion exchangers
    • Authors: O. P. Shvoeva; V. P. Dedkova; A. A. Grechnikov
      Pages: 542 - 545
      Abstract: Characteristics of complex formation of SCN–-ions with iron(III) on fibrous materials filled with an AV-17 anion exchanger (PANV–AV-17) and a KU-2 cation exchanger (PANV–KU-2) are studied by diffuse reflection spectroscopy. Sorption conditions of thiocyanate ions on PANV–AV-17 in the dynamic mode and the influence of concentrations of Cl–, SO 4 2- and NO 3 - on the sorption and analytical signals of thiocyanate complexes are studied. Sorption conditions of iron(III) on PANV–KU-2 and the conditions of formation of thiocyanate complexes are studied. Systems for the sorption–spectroscopic determination of 0.1–0.7 μg/mL of SCN–-ions in aqueous solutions of pH 5 ± 1 on PANV–AV-17 and test-determination of 5–30 μg of SCN–-ions on PANV–KU-2 are proposed.
      PubDate: 2017-05-01
      DOI: 10.1134/s1061934817030121
      Issue No: Vol. 72, No. 5 (2017)
       
  • Solid-phase spectrophotometric iodometric determination of nitrite and
           selenium(IV) using a polymethacrylate matrix
    • Authors: N. A. Gavrilenko; N. V. Saranchina; D. A. Fedan; M. A. Gavrilenko
      Pages: 546 - 550
      Abstract: Procedures for the iodometric solid-phase spectrophotometric determination of nitrite and selenium( IV) using a polymethacrylate matrix are proposed. The procedures are based on the reaction of nitrite and selenium(IV) with iodine in an acidic medium with the release of free iodine in amounts equivalent to those of the substances to be determined, extraction of the iodine formed with a polymethacrylate matrix, and measurement of absorbance of the matrix at 370 nm. The developed procedures ensure the determination of 0.01–0.12 mg/L of nitrite and 0.05–0.40 mg/L of selenium(IV) with limits of detection of 0.005 and 0.03 mg/L, respectively. It was shown that the proposed procedures can be applied to the determination of selenium(IV) in mineral water and nitrites in vegetables and soil.
      PubDate: 2017-05-01
      DOI: 10.1134/s1061934817030054
      Issue No: Vol. 72, No. 5 (2017)
       
 
 
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